Feed mechanism.



F. H. BLAKESLEE..

FEED MECHANISM.

APPLICATION FILED MAY 14. 1915.

1,26%305. Patented Mar. 26, 1918.

L'Ujdnzsses Jazz/anion marten srn'rns PATENT ent ies.

FRANK H. BLAKESLEE, OF CLEVELAND, OHIO, ASSIGNOB TO THE AJAX MANUFAC-TURING'COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

FEED MECHANISM.

Specification of Letters Patent.

Patented Mar. 26, 1918.

Application filed May 14, 1915. Serial No. 28,077.

To all whom it may concmm:

Be it known that I, FRANK H. BLAKESLEE, a citizen of the United States,and a resident of Cleveland, county of Cuyahoga, and State of Ohio,have'invented a new and useful Improvement in Feed Mechanism, of whichthe following is a specification, the principle of the invention beingherein explained and the best mode in which I have contemplated applyingthat principle, so as to distinguish it from other'inventions.

The present invention relates to a feed mechanism to be used in variousconnections and to be of particular valuewhere it is 'desired to securean intermittent feed for any given part of the mechanism without addingto the complication of the machinery by providing a reduced drivingratio for the feeding mechanism. While it is of no particular importanceas to what machine I have adapted the present feeding mechanism, it maybe stated, for illustration only, that it has been used for feeding barsof stock to forging machines. To the accomplishment of these and relatedends saidinvention then consists of the means hereinafter fullydescribed and particularly pointed out in the claims.

The annexed drawings and the following description set forth in detailcertain mechanism embodying the invention, such disclosed meansconstituting, however, but one of various mechanical forms in which theprinciple of the invention may be used.

In said annexed drawings:

Figure 1 is a plan View showing attachment of the present feedingmechanism to a forging machine designed for the manufacture of bolts,spikes and the like; and Fig. 2 is an end elevation of the feedingmechanism.

The general features of -the forging machine 1 will not of course bedescribed, as they are of no importance inthis connection and I willonly say that a link or lever 2 is attached to or operated by a maindriving shaft 4 of the forging machine. This lever 2 is connected to oneend of an arm 5 which is pivotally mounted, being rotatable on a shaft 6which bears one of a pair of complementary rolls 7 for engaging the barof stock 8 and introducing the same into the forging machine, the otherof such pair of rolls being attached to a second parallel shaft which isinter-geared with the first named shaft to provide for simultane- 011soperation.

Attached to the shaft 6 is a toothed wheel 9 which is adapted to benormally engaged by one of two similar pawls 10 which are pivotallymounted upon a common axis in the form of a pin 11 and are provided withextensions 12- which are adapted to be contacted by the several faces ofa cam 15 which is attached to a disk 16, the cam and disk being mountedupon a suitable stub shaft 17 which is pivotally mounted in a fixedbearing '18 and a movable bearing 19 slidable upon two parallel rods 20,the movable bearing being normally pressed against the fixed bearingwith a considerable pressure by means of a spring 21 interposed betweenthe movable bearing and a collar 22 which is attached to the twoparallel rods. The cam 15 is provided for the purpose .of controllingthe engagement of the pawls 10 with the toothed wheel and has, as shown,two spaced and parallel faces 13 which, when either engages theextensions of the pawls, are adapted to restrain the same fromengagement with the toothed wheel. Between such spaced and parallelfaces on the cam are other faces 1 1 which are adapted to permit theengagement of the pawls with the toothed wheel. The arm 5 is oscillatedby means of the lever 2 operated by the cam on the driving shaft andupon a forward movement of the arm one of the two pawls rotates thetoothed wheel through a portion of the revolution, if at that time thecam is in such a certain position that it permits the pawls to engagethe wheel. 7

The disk '16 which is attached to the cam controls the movement of thesame and is provided with four equally spaced one-way notches 25 on itsperiphery, there being a fixed pawl 26, which is mounted, not upon pawlprevents the disk from returning and the latter is moved through aquarter ofa revolution by the time the arm is returned,

to its initial position. This movement of the disk rotates the camthrough a quarter of a revolution, so that upon the next succeedingforward movement of the arm the pawls are held out of position with thetoothed wheel and there is no feed. In this way an intermittent feedingof the toothed wheel forward is secured and without the necessity forintroducing any reducing gearing between the main driving. shaft and theshaft which is to be rotated at such slower speed.

Either one or two pawls may of course be used and I use two for thereason that in this case there is always one pawl engaging thetoothedwheel preventing the same from slightly turning in either directionexcept when rotated by the feeding mechanism. The simplicity of theconstruction of the latter mechanism and the positiveness of itsoperation will be evident from the foregoing description. 7

Other modes of applying the principle of my inventionmay be employedinstead of the one explained, change being made as regards themechanismherein disclosed, provided the means stated by any of thefollowing claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as myinvention 1. In feed mechanism, the combination with a wheel toberotated, of an oscillatory arm, a pawl pivotally mounted on said armand normally engaging said wheel, a cam pivotally mounted on said armand adapted, in one position, to retain said pawl from engagement withsaid wheel, and means adapted to intermittently rotate said cam.

2. In feed mechanism, the combination with a wheel to be rotated, of anoscillatory arm,'a pawl pivotally mounted on said arm and normallyengaging said wheel, a cam pivotally mounted on said arm and adapted, inone position, to retain said pawl from engagement with said wheel, adisk attached to said'cam, said disk being provided with four equallyspaced notches, and a fixed pawl when either engages said pawl, topermit the latter to engage said wheel,'andmeans adapted tointermittently rotate said cam.

a. In feed mechanism, the combination withawheel to be rotated, ofanoscillatory arm,apawl pivotally mounted on said arm and normallyengaging said wheel, a cam.

pivotally mounted on said arm, said cam having two oppositely disposedfaces adapted when either engages said pawl, to retain.

the latter from engagement with said wheel,

and two other intermediate faces, adapted when eitherzengages said pawl,to; permit the latter to engage said wheel, acircular disk attached tosaid cam, said disk being provided with four equally spaced notchesonits periphery, and a fixedpawl adapted to normally rest upon saiddiskand to enin suchnotches, thereby causing a quarter turn of said diskupon each return oscillation of said arm;

5. In feed mechanism, the combination with a wheel to be rotated, of anoscillatory arm, a pawl pivotally mounted "on said arm and normallyengaging said wheel, a cam V pivotally mounted on said arm, said camhaving two oppositely disposed faces adapted when either engages saidpawl, to retain the latter from engagement with said "wheel, and twoother intermediate faces, adapted, when either engages said pawl,to-permit the latter to engage said wheel, a circular disk attached tosaid cam, said disk being provided with four equally spaced notches onits periphery, and .a fixed pawl adapted to normally restupon said diskand to engage in such notches, thereby causing a quarter turn of saiddisk, upon each return oscillation of said arm, and pressure bearmgs forsaid .disk and cam adapted to tend to maintain the same fromoscillation.

, 6. In feed mechanism, thecombination with a wheel to be rotated, of anoscillatory arm, two pawls pivotally mounted on said arm about the sameaxis, one of said pawls always engaging said wheel, a cam pivotallymounted on said arm, said cam having two oppositely disposed. faces,adapted, when e1ther, engages said pawls, to retanrthejlat terffrom"operative engagement with said Wheel, and tWo other intermediate facesadapted, When either engages said pawl, to permit the latter to engagesaid Wheel, a circular disk attached to said cam, said disk beingprovided With four equally spaced notches on its periphery and a fixedpawl adapted to normally rest upon such disk and engage in said notches,thereby causing a quarter turn of said disk upon each return oscillationof said arm, and pressure bearings for said disk and said cam adapted totend to maintain the same from oscillation.

Signed by me, this 13th day of May, 1915.

FRANK H. BLAKESLEE. Attested by THOMAS H. FAY, HORACE B. FAY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C."

